Refactor: Simplify module structure and reorganize services

- Removed system/ directory, merged applications into users/geir.nix
- Simplified fonts.nix to bare minimum (users can add more)
- Moved transmission.nix to sleeper-service/services/ (machine-specific)
- Organized grey-area services into services/ directory
- Updated import paths and tested all configurations
- Added research documentation for deploy-rs and GNU Stow

modules/desktop/fonts.nix

@@ -0,0 +1,22 @@
+{ config, pkgs, ... }: {
+  # Minimal font configuration - users can add more fonts as needed
+  fonts.packages = with pkgs; [
+    # Essential system fonts
+    noto-fonts
+    noto-fonts-emoji
+    liberation_ttf
+    
+    # One good monospace font for terminals/coding
+    nerd-fonts.jetbrains-mono
+  ];
+
+  # Console configuration
+  console = {
+    font = "Lat2-Terminus16";
+    keyMap = "no";
+  };
+
+  # Internationalization
+  i18n.defaultLocale = "en_US.UTF-8";
+  time.timeZone = "Europe/Oslo";
+}